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<table width="100%" summary="page for BrainpH"><tr><td>BrainpH</td><td style="text-align: right;">R Documentation</td></tr></table>

<h2>Brain pH Measurements</h2>

<h3>Description</h3>

<p>Brain tissue pH at time of death
</p>


<h3>Format</h3>

<p>A data frame with 54 observations on the following 5 variables.
</p>

<dl>
<dt><code>pH</code></dt><dd><p>Brain tissue pH</p>
</dd>
<dt><code>Sex</code></dt><dd><p><code>F</code> or <code>M</code></p>
</dd>
<dt><code>Ethnicity</code></dt><dd><p><code>AfricanAmerican</code>, <code>Asian</code>, <code>Caucasian</code>, or <code>PacificIslander</code></p>
</dd>
<dt><code>Age</code></dt><dd><p>Age at death</p>
</dd>
<dt><code>DeathType</code></dt><dd><p>Cause of death (<code>Cardiac</code>, <code>Other</code>, or <code>Suicide</code>)</p>
</dd>
</dl>



<h3>Details</h3>

<p>These are data from a PNAS article (supplemental file) on pH in brain tissue samples for controls and for people who had Major Depressive Disorder. We extracted just the controls (roughly 3/4 of whom died of cardiac arrest).
</p>


<h3>Source</h3>

<p>Jun Z. Li et al. (2013), &quot;Circadian patterns of gene expression in the human brain and disruption in major depressive disorder,&quot;  PNAS, vol 110, no. 24, www.pnas.org/cgi/doi/10.1073/pnas.1305814110
</p>
<p>Data extracted from Supporting Information, Table S4:
Li et al. www.pnas.org/cgi/content/short/1305814110
</p>


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